57.5-4.25-15.75 12.5怎么简算?

57.5-4.25-15.75 12.5怎么简算
2025-02-26 09:43:43
推荐回答(1个)
回答1:

57.5-4.25-15.75+12.5

=(57.5+12.5)-(4.25+15.75)

=70-20

=50